Spell Apache 2.0 correctly in fiat/README.chromium

Looks like it's meant to have a hyphen, to match the SPDX identifier.

https: //source.chromium.org/search?q=License%5C:%5C%20Apache%20file:README.chromium&sq=&ss=chromium
https: //chromium.googlesource.com/chromium/src/+/HEAD/docs/adding_to_third_party.md#add-a-license-file-and-run-related-checks
Change-Id: I553cb40dc0ef55a7a3634ac2488f389e1ed47dfc
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/77288
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Auto-Submit: David Benjamin <davidben@google.com>

third_party/fiat/README.chromium

diff --git a/third_party/fiat/README.chromium b/third_party/fiat/README.chromium
index b19c040..b2915c1 100644
--- a/third_party/fiat/README.chromium
+++ b/third_party/fiat/README.chromium
@@ -3,7 +3,7 @@
 URL: https://github.com/mit-plv/fiat-crypto
 Version: git (see METADATA)
 Revision: 6ccc6638716d4632304baf1adbb5c47c3a12ea6f
-License: Apache 2.0
+License: Apache-2.0
 License File: LICENSE
 Security Critical: yes
 Shipped: yes